I'm not sure I agree with some of those points. I find I'm more emotional attempting to use "mechanical investing" since I have little knowledge of the company's underlying fundamentals, and hence, less confidence in a pick.

If I read through the financials, do some research, and do a bit of work on the IS, BS, and Statement of CFs, I tend to have much more confidence and pay very little attention to short-term swings.

Of course, there is something to be said for making a good return with minimal time and effort.